function <function to write>{<function(s) to use>};
E.g.
function servercmdhide(%player){%player.hidenode("ALL");};
I think.
I might be mistaken, but the first variable set in a servercmd is bound to the client.
the proper, I believe , is
function servercmdhide(%client,%player){%player.hidenode("ALL");}
still wrong, that would require you to enter a name, not just work on you.